On: Janet – a Lisp-like functional, imperative program...

[pjmlp]

Lisp systems had it first, specially Lisp Machines, that is where Smalltalk got its idea from.

Xerox PARC was pursuing three workstation based OSes in parallel, based on Lisp, Smalltalk and Mesa (later evolved into Cedar).

So the ideas regarding images, REPL with typo suggestions, OS wide debugging, code browser,.... were available across them all.